From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750736AbWF0FN6 (ORCPT ); Tue, 27 Jun 2006 01:13:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933394AbWF0Ehp (ORCPT ); Tue, 27 Jun 2006 00:37:45 -0400 Received: from cust9421.vic01.dataco.com.au ([203.171.70.205]:21718 "EHLO nigel.suspend2.net") by vger.kernel.org with ESMTP id S933389AbWF0Eh2 (ORCPT ); Tue, 27 Jun 2006 00:37:28 -0400 From: Nigel Cunningham Subject: [Suspend2][ 03/13] [Suspend2] Compression cryptoapi initialisation and cleanup. Date: Tue, 27 Jun 2006 14:37:27 +1000 To: linux-kernel@vger.kernel.org Message-Id: <20060627043726.14320.63837.stgit@nigel.suspend2.net> In-Reply-To: <20060627043716.14320.30977.stgit@nigel.suspend2.net> References: <20060627043716.14320.30977.stgit@nigel.suspend2.net> Content-Type: text/plain; charset=utf-8; format=fixed Content-Transfer-Encoding: 8bit User-Agent: StGIT/0.9 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Add the routines for preparing cryptoapi for suspend2 use and cleaning it up. Signed-off-by: Nigel Cunningham kernel/power/compression.c | 37 +++++++++++++++++++++++++++++++++++++ 1 files changed, 37 insertions(+), 0 deletions(-) diff --git a/kernel/power/compression.c b/kernel/power/compression.c index 3d222b3..470644f 100644 --- a/kernel/power/compression.c +++ b/kernel/power/compression.c @@ -92,3 +92,40 @@ static inline void suspend_compress_free page_buffer = NULL; } +/* + * suspend_compress_cleanup + * + * Frees memory allocated for our labours. + */ +static void suspend_compress_cleanup(void) +{ + if (suspend_compressor_transform) { + crypto_free_tfm(suspend_compressor_transform); + suspend_compressor_transform = NULL; + } +} + +/* + * suspend_crypto_prepare + * + * Prepare to do some work by allocating buffers and transforms. + * Returns: Int: Zero. Even if we can't set up compression, we still + * seek to suspend. + */ +static int suspend_compress_crypto_prepare(void) +{ + if (!*suspend_compressor_name) { + printk("Suspend2: Compression enabled but no compressor name set.\n"); + suspend_compression_ops.disabled = 1; + return 0; + } + + if (!(suspend_compressor_transform = crypto_alloc_tfm(suspend_compressor_name, 0))) { + printk("Suspend2: Failed to initialise the %s compression transform.\n", + suspend_compressor_name); + return 1; + } + + return 0; +} + -- Nigel Cunningham nigel at suspend2 dot net